What is it?
is always defined in terms of change in
Locations or Positions are defined in terms of some
s we use our
to define F/R.
Scalars and Vectors
When discussing kinematics, and truly, all aspects of physics, we will be using two
different types of measurements
The Price is $12.00 is a scalar.
by $12.00 is a Vector.
As stated, a vector is a
(How big or How much) with a
n we will
draw vectors as ________________
pointing in the direction of the
We can add vectors (
Algebraically by placing the vectors
and then finding
the algebraic sum
is a Scalar
seem very similar, but they actually
have distinct meanings.
is a scalar quantity which refers to how
in going from
12 m is a
…it tells how far.
Displacement is a Vector
(generally written as….
which refers to the
. Direction can be given in a lot of ways,
directions (N, S, E, W) or by ___or
sign along the
) or y (
A student walks 100 m to the East and then walks 300 m to the West.
What is the
student’s total distance traveled?
At the end of her walk, what is her total displacement?
A student walks 4 m east, 2 m south, 4 m west, and finally 2 m north.
What is the students total distance? Displacement?
A family travels
50 km south on I
75 and then gets off on exit 117 and follows a dirt
road 15 km east.
What is the families total distance traveled?
At the end of their trip, what is their total displacement?
Speed & Velocity
In order to find the average speed or average
it has traveled by the
it took to travel that distance.
_______/___________ Or _____________
Defining and Calculating Velocity
We can look at and
in a couple of ways
It’s important to remember that
What is the velocity of a car that travels 75 km towards Richmond in 5/6 hour
(give answer in km/hr and m/s)
What is the speed of a person who runs 10 km in 1.5 hours (answer in km/hr and
is the measure of how
Formulas for acceleration (or change in velocity):
Acceleration is a measure of how
during a particular
length of time. Remember! Vectors not only tell How Big a Quantity is, but also in
So, a body may travel at a constant speed, but
An object moving in a circle is accelerating because
changing even if it’s
is remaining constant
Acceleration is a VECTOR
This means that Acceleration has a
It also tells us in what
This is normally done with
______ or _____
+ means to the
_____________ or _______
means to the
_____________ or ___________.
So by convention, if an object is
, and the acceleration
(speeding up) is in the same direction as the velocity. This gives the object a
If an object is
, and the acceleration (slowing down) is in
the opposite direction of the velocity. This gives the object a
Examples of acceleration
Give some examples of positive acceleration
Give some examples of negative acceleration
Name four controls in a car that can cause an acceleration
To find acceleration, we divide the
it takes for that change (rate of change of velocity)
A vehicle initially traveling westward at 35 km/hr and comes to a stop in 15 s. What
is the magnitude and direction of the acceleration of the
A rock is dropped from the top of a cliff and after 10 seconds is traveling 40 m/s.
What is the magnitude and direction of the rock’s acceleration?